docs: def post(self, request, ext):
          """
          Render data for plugin and return text response.
          """
          try:
              plugin = plugins.get(ext)
              data, meta = self.get_post_data(request)
              data = plugin.load(data)
          except UnknownPlugin:
              raise Http404
          else:
              content = plugin.render(data)
              return self.render_to_response(content)